Extending the deck 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Working with Students Further Resources This task is about working out area. Question 1Change answer The Jacobs have a diamond-shaped deck. Its measurements are shown in Diagram 1. The Jacobs have a diamond-shaped deck. Its measurements are shown in Diagram 1. a) What is the total area of the deck? m2 Question 1Change answer They decide to extend the deck on one side. This is shown by the thick dotted lines () in Diagram 2. They decide to extend the deck on one side. This is shown by the thick dotted lines () in Diagram 2. b) What is the total area of the deck now? m2 Task administration: This task can be completed with pencil and paper or online (with auto marking displayed to students). Level: 5 Curriculum info: Maths, Geometry and Measurement, Measurement Keywords: area, composite shapes, triangles Description of task: Students calculate the total area of a deck and a deck with an extension. Learning Progression FrameworksThis resource can provide evidence of learning associated with Measurement sense, sets 7-8 within the Mathematics Learning Progressions Frameworks.Read more about the Learning Progressions Frameworks. Answers/responses: Y10 (12/1997) a) 24 m2 moderate b) 36 m2 moderate Diagnostic and formative information: Common errors Likely calculation Likely reason a) 25 5 × 5 Assumes area of rhombus = area of square. a) 720 3 × 3 × 4 × 4 × 5 Multiplies all dimensions to get area. a) b) 20 24 5 × 4 5 × 2 + 7 × 2 Confuses area and perimeter. a) b) 34 48 5 × 4 + 3 + 4 + 3 + 4 34 + 2 × 7 Confuses area and total length of all lines. Chocolate measures Area of triangles Bush reserve Measuring road signs Posting a box Area of the section Blocks of land Work out the area Volume and surface area Squares and rectangles How big is the dressing table? Colours on the flag Measuring the park Enlargement and area Enlargement, length and area Three oranges Tiling around the pool Corinth Canal Area of four lawns Volume of cream Calculating a pyramid Estimating the area of Antarctica Shot Put circles Painting a water tank Triangles and rectangles
